S.DICE possibly worth shorting but you need to be really careful shorting bASIC. If Avalon fail to deliver in bulk and BFL DO deliver then a short MAY pay off - but if batch 2 Avalon ship on schedule then you'll likely end up losing fairly heavily on a short of bASIC. Unlike most other mning companies bASIC still has most of its share value in existence (Due to not having spent most funds raised) - so scope for shorting it is pretty limited as the vast majority of its price is in actual BTC. That makes its price more stable than many other companies where 1 BTC of share price is only backed by 0.5 or less BTC of assets (your own company is actually currently trading at around its asset value - but many others are trading well above it).